用刚果红离子缔合负载形成树脂分离Rh、Ir、Pt、Pd、Au的研究

Study on Separation of Noble Metals in Osmiridium With Congo Red Ioaded Ion Association Forming Resin

研究了锇铱矿的锇钌蒸残液中Ｒｈ、Ｉｒ、Ｐｔ、Ｐｄ、Ａｕ的分离条件。于ｐＨ１．０的ＨＣｌ介质中将贵金属吸附于刚果红负载形成树脂上，以分离贵贱金属。然后用０．５ｍｏｌ／ＬＨＣｌ洗脱Ｒｈ；３ｍｏｌ／ＬＨＣｌ洗脱Ｉｒ；０．５％的ＮａＳＣＮ－０．１ｍｏｌ／ＬＨＣｌ洗脱Ｐｔ；５ｇ／Ｌ硫脲－０．１ｍｏｌ／ＬＨＣｌ洗脱Ｐｄ；５０ｇ／Ｌ硫脲－０．１ｍｏｌ／ＬＨＣｌ洗脱Ａｕ。洗脱顺序是Ｒｈ＞Ｉｒ＞Ｐｔ＞Ｐｄ＞Ａｕ。这五种贵金属的回收率在９５％～１０１％之间。

The condition of separation for Rh、Ir、Pt、Pd and Au in residuary solution after distilling Os and Ru from Osmiridirum solution has been investigated in this paper.This five Noble Metals are absorbed by Congo Red forming resin column in pH1.0 HCl solution,and separation from base metals.Then ,0.5mol/L HCl,3mol/L HCl,5g/L NaSCN 0.1mol/L HCl,5g/L CS(NH 2) 2 0.1mol/L HCl,50g/L CS(NH 2) 2 0.1mol/L HCl were applied to elute Rh,Ir,Pt,Pd and Au respectively.The order of eluting is for Rh,Ir,Pt,d,Au.Recovery of the Noble Metals are 95%～101%.The determination of five Noble Metals in Osmiridium by standard addtion methods is carried out with good results.